Radial drill



w. SCHELLENBACH 1,861,030

RADIAL DRILL May 31, 1932.

Filed May 15, 1929 4 Sheets-Sheet l INVENTOR W K 14 1- manna W. L. SCHELLENBACH May 31, 1932.

RADIAL DRILL Filed May 15, 1929 4 Sheets-Sheet 2 P4 A g 2 k 1* T w u K x w a x a x m X; N u

R QR N; N "1 U- \x w y 31, 1932- w. L. SCHELLENBACH 1,861,030

RADIAL DRILL Filed May 15. 1929 4 Sheets-Sheet 3 y 1932- w. L. SCHELLENBACH RADIAL DRILL 4 Sheets-Sheet 4 B mfim W W ATTORNEY,

on the column,

pany and Joseph Jewsbur 2B clamp is operatedvby means of a lever atthe column and .arm, cl

Patented May 31, 19 32 um'rsosm'rss Lactose PATENT orncsh OHIO, ASSIGNOR TO THE AMERICAN TOOL CORPORATION OF OHIO RADIAL DRILL Application filed May 15,

This invention relates to radial drills of the type having a column pivotally mounted upon a stump, an arm vertically adjustable and a drilling head slidably mounted on the arm. i r t is a recent tendency among the designers ofiradial drills to provide them with very longarms at anyvpoint along which the drilling head may be used. In positioning the 1g drilling head over the exact spot to be operated-upon, itis necessary for the workmen to; swing the rm radially in relation to the base, which-involves, pivot-ally moving the oolumnupon: thestump, and it is also necessary tokraise orlower the arm; upon the tilhecmechanismi for clamping the The inventor is fully aware of an English Patent N 0. 166,844 to James Archdale & Comin which thearm and splined toslide on an shaft disposed along; the arm,

r i'l he o jectof this invention isto provide 5 improved -meehanism for performing both t relatively. ponderous and, complicated from an engineeringspoint of view, as'a result of which it is requisite that certammechamsms H to the present-problem which is to make the arnrpositioniiig mechanism operable from 1929. Serial No. 363,323.

for operating clamping mechanism relatively spaced on the column from th with other mechanism on: which fulfil their functions 0, space and parts.

Further objects more fully set forth in the the accompanying drawings, in which:

incorporating the present improvements.

igure 2 1s a sectional view taken on line 2-2, Figure 1, illustrating the clamping mechanism for locking the arm to thecolllmIl.

Figure 3 is a sectional view taken on line -3, Figure 2, further detailing the arm locking mechanism. igure 4 is a. sectional View taken on line 4 4, Figure 1, illustrating the mechanism for clamping the column to the stump. 7

Figure 5 is an enlarged fragmentary front view of the lower end of the column, further illustrating the clamping mechanism; L Figure 6 is a sectional view taken on line 6.6, Figure 4, detailing the mounting of the crank sleeve for operating the column clamp. Figure 7 is a sectional view taken on'line 7, Figure 1, illustrating the connections from the horizontal operating shafts on the arm to the vertically disposed column clamping shaft and arm clamp operating cam sleevev Figure ,8 is

a sectional of the shafts Figure 9 is 99, Figure 8, further detailing the mountfrom the sleeve 14. Another drag link coning of the clamp operating levers. nection 26 links the crank 22 extending from Figure 10 is an end elevation detailing the the lower shaft to the crank 23 carried by hanger for mounting the outer ends of the the arm and splined to the shaft 11. shafts on the arm. The result of the use of the mechanism 70 Refenring to the drawin s, the easel has a above described is that the workman who is stum nz nonhtefl thereon a j" ntitobrr end. positionin'thi fill od dn'the whii a tiin ex- Upon the stump is rotatively mounted agoh aot point, can operate both the column clamp unin 3. Thiseolumn fihas an arm 5 slidably and the arm clamp from the dril lin head ninifiited thereon'for rotative and verticalad withonte'ithr fii's justment 6r the arm relative to the work tion from flit work. "he to operate mounted on the base. 7 7 the column clamps, he throws the lever A drilling head 6 is slidably mounted on harried by the drilling head which rotates the the arm over the base so es to be adjustable shaft to whieh itisisplined. This rotates the 15 thereon to any point over the Work. EX- eccentric on the end of the shaft ad'acent to tending from the'hottoin of theidrilling head the eorumii'whieh draws the drag i'irrlr 3onis the spindle 7 Onthe end of the arm opneetion, ope' tes "the ertmkrwtlifial te sheflt posite to the end on iwhioh the drilling head is 11; rotates shaft 11 and the'nranklat the'w mounted is an electric motor SwWhich provides trim of it which swings the iever: etnmelfing 20 the power for the machine. It ist'o bennderthis crank to the column claxnpfimd re; a stood that the drifl described: is finrely "sethe column elainp. leotedazs disclosing ohetype of drilling ma- If the workrnhnwishe's to dpliriteflie arh chine to which the invention can be applied ciainp he throws. the lever flfi carriefl *bytke and that the invention'oanbe aipplied to (Ithe'r drill??? head Wlllh tliltlis the HS designs of radial drill as Well; end, iioh pullsfthedralg lmlmbnflctiefite- A elamp 971s provided at the bottom of curedto'said eraiikfiota'tes the sieeweatrdm the :eolu'rnn to look hate the stump in any deried by the arm, 'nroi e s the leveripivoted to sired position; and molaritplO is carried by the arm, and operates the'ttrm ellfilifb Ht'ls thecarm'to loclrit to the eolnmn in any deto be understoed heweveqtnet varimseaia JJ sired-position. Theseiclafirpswill he hereintypes oft "ooiinectiiih mfi bw-suhsfitntiiid M "1 after described in detail. a 1 those disele's'edarid abew'neeerngiefl, bflt lifilit =Meimted upon theeohlinn and extending certain advantagesdinlfere fin tlieepeiiie parallel thereto is a shaftil. At tli 'e hottom mechanism; which advanta es ten be of this shaft 11 there is anneehanieal confully epparerr-t iroihtheMistingWidthiliafiii nention to the column ctam'p As disclosed, m-iptign o'fthe various a-rfich aflieafhemfls this meohanicaleonnection eorhprisesacrank nd organizations. 12"secured to the 'sha'ft'fl and a crank arm 13 connecting the crank to tl'fe column clamping 7 nieans. V The enlargedlower nddf theoehfimn'telu- .314 For operation of the arm clamp, a sleeve'14 soopicaliy engaged over the stmnlp haseifls is loosely rotatively mounted on the shaftll lower portion offsplitri 'fdrm, the-split and'supported :o'nthe arm. Thissleeve "emring form pertien being de heil'bywhliri'mmbodies a cam 15 which operatesnponahe l talslotQ? circnrnferentially'efltin th'eetfitflim crank lever'l6 pivotedto'the arm and'this'leimmediateiyebo've' h e sgilitr; *A draiwvpimw vergoperates the arm clamping means. belt 28t1faversesthef eans at eaehneiflewf the The arm carries two shafts 17 and 18 paralsplit, and is firovided upondne em'l'wi'th w lel to it, theseshafts traversing the drilling nut 29. A washer30is-rplaeed betn een the head. {Manually operable levers 19 and20 nut and'the'adjaeentar; llhwheadwflfifif are splinedto these shafts 'and'pivotally sethis draw pinrefitends Semen other: $1; cured to the drilling head so that they travel The hea d e ndofithe dram rillingi headalong the arm and oonneetedtothe orafikflmr dfiamfifiwhfch point he thrown'to rotate the e'ntendsovertothemoliimf ol eta-ornate eli refparalllelfto the arm, At the vertical shafit 1'1; Thisend n fi the-ieveir ds' f these shafts are orariks'2'1 and slotted toretreifie' the'dmw'lpin heefiyandm m f 22 a r L g pivot pin 33passesthtoirghtheiholehedind thistef trfllygitnfling shaft 11 is prolever. Thisendrffthedewir is firovidedhfih Vided witflh a efzfnliQSf hili is secured to the a eainmin-g' end'fi twhiel'mhiltsagaihtmmsh are ai iddplinid tii the'slia tt so that it travels er 351m the bolt andagainst theear;sertlrat up and down with the arm and can be operwhen the end of the'leveradjaicent'torthe shaft I atd torotate' theshaft'fi at any positlonof ll isinoved awayiroxntheoohimnetherlem the agfin ohthe ol'iimn. cams on the portion abuttingwthe' grailiryanflr The sleeteslaabout "tlfe'shaft 11 has a tends tosder'awfitheearstogether aiifls craii'k'fl' seurd' theretofiOne draglifik'cbnthe coluinnto-the=stumpysincethe nection 25 links theerank 21 on'the enddf of the ooh Inn]; below theaciroflmierntitlrelt m thelappershaft to the crank 24 extending lias'therequisitedegreehfifiexibility;

emma 3 (see c a; summit The GIMME .by mmaewhicmhisem meansefi i'seeannectedta tlm shaftiextendingelengther im- .31 from tha shatti arm iasecuredlenithe sleeve bellewithe casing:

W afiirrthe Show 56:. The btllibearirlgssare%heldin;placerby I! tss s mtmh adsfmm WhlflhiQfiWkdQi means: of. closure: plates; 58i-58i secured to: m

im scale 'mt k 'Elwlevwleiseonnwteei atbeiesae Bil by; mna fereeaneetwg; iphfli-m secured hetmemthewmek: H and; Jme. v m 'B wsleeve 36 ear-amen ling the wait endis j eiwabreeketifl whieleisseeiwed. ertbe W: was t pattens xi- We of screws. The head at the lower end oi. the! eve: is; $531M with a eieemufe mt al IQg groove 42 111 its periphery in which is disposed a packing ring 43 engaging the bore of the bracket 41. Within the bracket and about the sleeve are two spaced ball bearings 44-44 seated in counterbores of the bracket. qsAbove the top ball bearing is a retaining collar 45 which is screw-threaded on the sleeve and set by means of a spring clip 46. This collar is also provided with a peripheral groove in which is disposed a sealing ring 47. Arm clamp As disclosed, the portion of the arm about the column is split. At the top and the bottom of this portion of the arm and adjacent to the split portion are sets of opposing cars 48. Each pair of opposing ears is traversed by a screw 49, the head of which is countersunk in one ear and which has a nut on its other end. By means of this screw and nut Warrangement, the appropriate residual tension is imparted to the ring. The nuts 50 are set to permit the ring to spread so that the arm is free to be moved. Each pair of op posing cars is also traversed by a draw bolt it 51, each bolt being provided with a nut 52 on its end on the side of the ears away from the clamp operating mechanism. The other ends of these clamping members are headed and these heads 53 have conical ends seated in in conical depressions in levers 54 which extend toward the middle portion of the ring, vertically speaking.

Between the ends of these levers and the ears are washers 55 through which the draw bolts pass. Therefore, when the other ends of these levers 54 are moved in a direction away from the operating mechanism and toward the split of the ring, they rock upon the washers and exert pulling influence upon the draw file bolts, forcing the ears together, and binding the arm to the column.

These levers 54 are operated by a mechanism disposed in a casing 56 which is secured to the arm by means of screws. This bracket Ris traversed by the vertical shaft 11. The sleeve 14 which surrounds the shaft 11 and which operates the arm clamp is journalled in this bracket by means of ball bearings 57-57, one mounted in the top wall of the bracket ,flfisand one in the bottom wall of the bracket.

the walls of the casing 56:

Thersleeve within theebraoket embodies'a cam 15 which engagesa cam rollers 59 mount d .11 0 26 lldmf thabell crank. lever! 1A1. 'vetal 1y securedWithisnthebracket. Theet nendr of. thisbelhorank lever almtsa plunges- 6L meiuited vai-thimthe bracket, andon the other ueleefrthis gtmiger-is dispensed mine 60, iapi-ngmppes andtlower radial flanges. The: edlgwenti endsfif'ifis-levers- 54. enter the easmg 56 adjpeentlto. this-fiangedfelement andi eachensavrespeetive-flangethereofi In. ordeie to, pnovideappmpniater adjeste ment a-studfiZeisserew-th seeded imtethe end 3 ot the fiayrrgedtelement and; abuts the cadet a the planfif" mauntecl in theelementL. belttoan. secured in any, desiredlpoaitioni by means of aateeknutr 63marriedbytit em theoutslde of theefiaznged eiement. Ineoperav tien,,.the turni efs-the sleevewmoimted-rupon: the ventica ltsha till. oanses thercam to-iroeltz the belt'zcmnkilever which fornessthepluager in the; directiom oi the. clamp. itselt, which; causestlied memherzto aetuatovthe lairersefi le extending fi-ome the ebossessalidy fierce tbemtewardthe in; the ring which openatis the. clamp. and! binds the ware toa'the 0Q unm- (Ubmwettm ta teale1 Extending-downwardly. from the bettom of thedril headnsarlerver'sugpcwta'ai whicli the sharfinsrparallle Themanuaiiyi tiger-axed h. toatresp r" twe. sfiafit each hand: lever: being; 'pgmavd, (see Figyirefii) with asleeve fiawhichiextendst thno Lthesupporting amdjsheld p vota 80. iii. by, means of a: retaining nut. 66! on. t e, opposite. side; of. the supporting member. from, the. extending layer. portion,E e. handleve ther fore. travel .withthe. grilihng, head and. are pivotally connected:-

QB. the rinuetgemlz ottha. arm adjaeentto the olnmniashaft hanger. 6'Z.is:secured by mnsnoimrews fifi... .Tl1-1S 3lifltRfiQVid6S.- jouimalstonithe limes emisof thesaidthm'ie zoniiahshaftsi The outer ends: ofthe hori zqntal., sha.fl;s are: journalledz-in .a hang; 69; en irome extrememutenendtet-thm arm. On the inneriend; of eaqhshait ahead? edsleeveflflflissecumd, and. balh hearim gs, Z1 are, disposed. between. the head and the, e ces, iast ll ,stretei ia ssm1 wQe h ewe s e a d we pes tesxdeofthe h r from thehaltbear ,7 lugs, .nutst, 2tare sqr wmd-f e theislem, sliafisraggnst lnfl danaL, disp acement. Extending r u'ltfi; 9H

Ill

ends of each flanged collar are cranks'Ql, 22, each having a pin 73 on its end. As dis closed in Figure 8, these pinsare horizon-- tally disposed; Pivoted on these pins are the drag links which operate the mechanism centering on shaft 11.

The* links are each connected to the pins 73 by means of a nniversa'l joint. A yoke 74 each link is secured to a collar 75 rom tatablymounted on a respective pin 73 by means of pins 76 radially extending from thecollar. The connection of the links to the levers on the shaft 11 is also universal, there being a yoke 7 7 en aging radial pins 5:1. 7 8' in the head of a rotata le bolt 7 9 depend-v ing from each lever on the shaft 11.

It will thus be observed that the entire connection of the links is a universal connection since the drag links pivot vertically in w; relation to the cranks on the end of the horizontal shafts, and pivot horizontally in relation tothe cranks carried by the sleeve 14 and the sleeve splined to the shaftll. Therefore, as before described, the hand levers upon the drillinghead respectively operate the arm clamp and the column clamp.

The mechanism above described is very simple considering the result accomplished. The parts are relatively inexpensive to manufacture and the design is such that reasonable tolerance in dimensions is permitted. Furthermore, the mechanism is readily lubricated, involves but little friction, due to the presence of numerous ball bearings, and I8 is pos1t1ve 1n its operation.

Having'described my invention, I desire to be limited only by the ensuingclaimr i In a radial drill ofthe type having a column pivotally mounted upon a stump, an

mi arm vertically adjustable on said column,

and a drilling head slidabl mounted on said arm, mechanism operable rom the head for clamping the column to the stump andthe arm to the column, said mechanism, comprising, a vertical shaft carried by the column, a crank disposed on the arm and splinedto said shaft, a sleeve mounted on the arm above said crank, said sleeve surrounding said shaft and rotatable upon the same'axis, a clamp "carried by and adapted to secureit tosaid stump, a

craiikj on said vertical Shaftnear thebott om of the column, mechanical connection between said clamp and said latter crank "whereby the rocking of the shaft clamps and unclampsthe'colifmnf'a clamp carried the arm ad'apted to clamp it "to the column,

a cam carried by said sleeve mounted on'the arm; echanical fnonn ction fbetvveeii said ann" clamp and tiie caiii ca'ri'iedb y said sleeve whereby the roking hf said sleeve clamps and nnclamps said we horizontal share earne a saa'a ap-siaams we vet-sing thehed t'v'volevei'smonnted in the linedto eachshaft, a crank on said column the end of eacli horizontal shaft adjacent to the column, 'a dra g link connection between the crank on'dnefhoififiontal shaft and the crank splinedto the vertical shaft carried by the column, so that'the roekin of one shaft causes a rocking of'the'other o operate the column clamp, anda drag link connection between the crank on the other horizontal shaft and the sleeve mounted on "thearm, so: that rocking of the second shaft rocksthe sleeve to operate thear'm clampf 1 In witness where f,I hereunto subscribe my name. i j WILLIAM L. SOHE'LLENBACH. 

